Same problem here, jittery mouse, slow Scrolling - i7-4700HQ, 8gb ram, win8.1 64bit, Geforce GT750M.
Played some 10 turns as CP in 1914 campaign, AI as "handicapped". Could as well have surrendered the same turn, as Liege still was in Allied hands, and the Eastern front a mess. Observed Russia upgrading units like crazy, Allied Forces outnumbered mine everywhere.
"A big butcher's bill is not necessarily evidence of good tactics"
- Wavell's reply to Churchill, after the latter complained about faint-heartedness, as he discovered that British casualties in the evacuation from Somaliland had been only 260 men.